Results 71 to 80 of about 2,238 (210)

Improved deresination during oxygen delignification

, 2003
Washing after the oxygen delignification stage in aspen kraft pulping has been shown to reduce the extractives in pulp. It was previously shown that this can be enhanced by the addition to oxy- gen delignification of a certain generic surfactant. Further
Lapointe, C., Bouchard, J., Allen, L.H., Pitz, M.   +3 more
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Strength enhancement of fiber network by carboxymethyl cellulose during oxygen delignification of kraft pulp

BioResources, 2008
Sorption of carboxymethyl cellulose (CMC) on the fiber surface was applied during oxygen delignification to enhance the strength properties of softwood kraft pulp.
Eero Kontturi, Mia Mitikka-Eklund, Tapani Vuorinen   +2 more
doaj  

Influence of plum gum and sodium perborate addition on spruce kraft pulp properties during oxygen delignification

, 2010
The aim of this study was to investigate the effects of plum gum liquor and sodium perborate addition to oxygen delignification process on spruce kraft pulp properties.
Uçar, Mualla Balaban, Gümüşkaya, Esat, Emrah Peşman, Peşman, Emrah, Kirci, Hüseyin, Mualla Balaban Uçar, Esat Gümüşkaya, Hüseyin Kirci   +7 more
core   +1 more source

Pulp strength enhancement by oxygen delignification [Elektronisk resurs]

, 2022
Oxygen delignification is widely used in the pulp and paper industry as a part of delignification process between the kraft cook and bleaching. However, its potential has not been fully utilized.
Esteves, Claudia,, Chirat, Christine,, Östlund, Sören,, Brännvall, Elisabet,, Sevastyanova, Olena,   +4 more
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AVALIAÇÃO DAS PROPRIEDADES FÍSICO-MECÂNICAS DE POLPAS PRODUZIDAS POR NOVAS SEQUÊNCIAS DE BRANQUEAMENTO

Ciência Florestal, 2010
The efficiency of oxygen delignification is very low for pulps of low number kappa and with high concentrations of hexenuronic acids, therefore the oxygen does not react with these acids, so being minimum the elimination of these during the oxygen ...
Cristiane Pedrazzi, Jorge Luiz Colodette, Rubens Chaves de Oliveira, Marcelo Coelho dos Santos Muguet, José Lívio Gomide   +4 more
doaj  

Biomimetic TCF Bleaching of Pulp by Simple Inorganic Complexes of Cupric/Cobalt Acetate [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2014
Oxygen delignified kraft pulp from eucalyptus (E. urophylla × E. grandis) was catalytically pretreated in aerobic condition using ammonium persulfate in present of catalists like cupric acetate and/or cobalt acetate in acetic acid-water solution, i.
Xue Fei Zhou
doaj  

ENHANCED SELECTIVITY OF OXYGEN DELIGNIFICATION BY CHERRY AND GUAR GUM ADDITIVES

Cellulose Chemistry and Technology
Natural polysaccharide-based gums produced by plants in response to biotic or abiotic factors are used in various industries due to their biodegradability, renewability, biocompatibility, and non-toxic properties. This study examined the use of these gums in a new application, such as adding them to the delignification liquor to decrease the negative ...
Iskefyeli, Ayşegül (58880064800), Kirci, Hüseyin (6602882061), Kalyoncu, Evren Ersoy (35105101700), Erişir, Emir (44360952500), Department of Forest Industry Engineering, Faculty of Forest, Karadeniz Technical University, Trabzon, Turkey; Department of Material and Material Processing Technologies, Arsin Vocational School, Karadeniz Technical University, Trabzon, Arsin, Turkey; Department of Material and Material Processing Technologies, Pamukova Vocational School, Sakarya University of Applied Sciences, Sakarya, Pamukova, Turkey   +4 more
openaire   +2 more sources

AVALIAÇÃO DA SENSIBILIDADE DAS ANÁLISES DA LIGNINA RESIDUAL PELOS MÉTODOS DE NITROBENZENO, ÓXIDO DE COBRE E ACIDÓLISE

Ciência Florestal, 2014
This study aimed to evaluate the sensitiveness of the information obtained for the residual lignin from Eucalyptus grandis kraft pulps analyzed through the nitrobenzene oxidation, copper oxide (CuO) reduction and acidolysis techniques.
Gustavo Ventorim, Alexandre Coelho, Jorge Luiz Colodette, Ericka Figueiredo Alves, Jaqueline Silveira Comelato   +4 more
doaj  

Clean Bleaching Engineering Practice for Bagasse Pulp: Totally Chlorine-Free and Elemental Chlorine-Free Bleaching Realized with the Same Production Line

BioResources, 2015
The experimental research, process design principles, and engineering practice of a bagasse pulp production line that could run both totally chlorine-free (OP)Q(PO) and elemental chlorine-free (OP)D(EOP) bleaching sequences are discussed in this paper ...
Zhi Li, Jun Li, Jun Xu, Li-huan Mo
doaj   +1 more source

Kinetics and Mechanism of Oxygen Delignification

, 2007
Considerable research has been conducted into the kinetics and selectivity of the oxygen delignification process to overcome limitation in its use.
Ji, Yun
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